Newtons 3 Laws of Motion

Newtons 3 Laws of Motion

Newtons Law of Inertia

Newtons first law states that an object at rest stays at rest while an object in motion stays in motion unless acted on by another force. For example, when a car suddenly stops, your body keeps moving forward until stopped by the force of a seat belt. Also when you throw a ball, it will keep moving in a straight line until the force of gravity pulls it downward.

The seat belt's force keeps you from launching forward.

Gravity forces the ball downwards.

The seat belt's force keeps you from launching forward.

Gravity forces the ball downwards.

Newtons Law of Acceleration

Newtons second law states that objects with a heavier mass require more force to accelerate. For example, it will take twice as much force to move a 20 pound box compared to a 10 pound box. In baseball, it requires more force to hit a homerun than to bunt.

The heavier box has more force applied to move the same distance as the lighter box.

There is a lot of force in the homerun.

The bunt took a lot less force.

The heavier box has more force applied to move the same distance as the lighter box.

There is a lot of force in the homerun.

The bunt took a lot less force.

Newtons Law of Action-Reaction

Newtons third law states that for every force there is an equal force in the opposite direction (every action has an equal and opposite reaction). When leaning against a wall with 2 newtons of force, the wall is pushing back on you with 2 newtons of force in the opposite direction you are leaning. Even when you are walking, you push down on the ground with 10 newtons of force and the ground pushes up on your foot with 10 newtons of force.

While she pushes on the wall, the wall also pushes back on her.

The force of the foot goes down, but the force of the ground goes up equally.

While she pushes on the wall, the wall also pushes back on her.

The force of the foot goes down, but the force of the ground goes up equally.